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date: 24 February 2020

Abstract and Keywords

This chapter highlights the diagnostic features and clinical characteristics of tic disorders and Tourette syndrome, trichotillomania, and nailbiting, and their diagnostic distinction from OCD and other conditions. Nonclinical forms of these disorders are described. Information on the prevalence and limitations of epidemiological research is provided. The gender ratio, age of onset, longitudinal course, functional impairment, and healthcare utilization are described for each disorder. The cross-cultural features of the disorders are highlighted, and patterns of psychiatric comorbidity are discussed.

Keywords: Tourette syndrome, trichotillomania, nailbiting, nonclinical, differential diagnosis, prevalence, impairment, cross-cultural, comorbidity

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